x402basequality 0.35

Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/keys/12

What it does

lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/keys/12` is labeled "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, accounts, or subscriptions are required; callers attach an X-PAYMENT header to each request.

The wider platform advertises four endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. The platform claims no rate limits, no minimums, and instant access.

Note that the specific functionality behind `/api/v1/keys/12` ("Premium API Access") is not documented beyond its title. There is no OpenAPI schema, no request/response examples, and the crawled docs pages (/api, /pricing, /README) all returned only a "Connect wallet" prompt with no additional content. The endpoint is confirmed live — it returns a valid x402 402 challenge — but what data or service it actually provides is unclear.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keydata-analyticsai-inferencefinance-datautility-services

Use cases

  • —Accessing data analytics and reports without creating an account or managing API keys
  • —Running AI inference tasks (sentiment, summarization, classification, embeddings) on a per-call payment basis
  • —Fetching financial data such as price feeds, exchange rates, and gas estimates via crypto micropayments
  • —Using utility endpoints like geocoding, validation, and conversion with instant USDC settlement

Fit

Best for

  • —Developers who want zero-friction API access without subscriptions or API key management
  • —Agents and bots that can settle payments programmatically via x402 on Base
  • —Low-volume or sporadic API consumers who prefer pay-per-use pricing

Not for

  • —High-volume production workloads where $0.02/request adds up significantly without bulk discounts
  • —Users who need detailed API documentation, schemas, or SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/keys/12 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/keys/12
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation explaining what /api/v1/keys/12 actually returns. The crawled pages beyond the landing page were empty. The listing is effectively a stub with pricing info only.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The specific functionality of /api/v1/keys/12 ('Premium API Access') is undocumented — unclear what data or service it provides
  • —All documentation pages (/api, /pricing, /README) returned only a 'Connect wallet' prompt with no useful content
  • —No request or response examples available anywhere in the crawled material

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:06:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/fSwRSk
Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart